OLDFIELDS SCHOOL
NPDES ID: MD3428C03
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
This quarter: 4 effluent violations.
Violations
May 31, 2026
BOD, 5-day, 20 deg. C
43% over limit
Discharged 43 mg/L against a permitted limit of 30 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
340% over limit
Discharged 44 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, total [as N]
70% over limit
Discharged 17 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
80% over limit
Discharged 54 mg/L against a permitted limit of 30 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, total [as N]
150% over limit
Discharged 25 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, total [as N]
120% over limit
Discharged 22 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
3% over limit
Discharged 31 mg/L against a permitted limit of 30 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
January 31, 2026
BOD, 5-day, 20 deg. C
23% over limit
Discharged 37 mg/L against a permitted limit of 30 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.6 SU against a permitted limit of 8.5 SU (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
3% over limit
Discharged 31 mg/L against a permitted limit of 30 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
110% over limit
Discharged 21 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, total [as N]
180% over limit
Discharged 28 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, total [as N]
150% over limit
Discharged 25 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, total [as N]
240% over limit
Discharged 34 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, total [as N]
170% over limit
Discharged 27 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, total [as N]
150% over limit
Discharged 25 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, total [as N]
140% over limit
Discharged 24 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, total [as N]
40% over limit
Discharged 14 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, total [as N]
80% over limit
Discharged 18 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, total [as N]
50% over limit
Discharged 15 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, total [as N]
70% over limit
Discharged 17 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, total [as N]
40% over limit
Discharged 14 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrogen, total [as N]
70% over limit
Discharged 17 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, total [as N]
110% over limit
Discharged 21 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)